Harlow Shapley first located the center of the Milky Way Galaxy in 1917 by
A) measuring the positions of supernova explosions throughout the Galaxy.
B) observing the distribution of globular clusters in the galactic halo.
C) measuring redshifts of stars in the galactic plane and disk.
D) observing the distribution of hydrogen gas, measured by 21-cm radio emission.
Correct Answer:
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Q55: Why is it that astronomers rely upon
Q56: In 1917, Harlow Shapley plotted the positions
Q57: The method used by Harlow Shapley in
Q58: The one component of the material of
Q59: The spiral-arm structure of the Milky Way
Q61: The 21-cm line is one of the
Q62: Recent observations seem to indicate that, rather
Q63: The major advantages of the 21-cm radio
Q64: Which of these statistics is NOT useful
Q65: The stellar components of the Milky Way
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